Solve the differential equation

dydx=8x+4y4x+8y\displaystyle \frac{{{\left.{d}{y}\right.}}}{{{\left.{d}{x}\right.}}}=\frac{{{8}{x}+{4}{y}}}{{{4}{x}+{8}{y}}}

Write your solution without logarithms, and use a single, consolidated c\displaystyle {c} as a constant.